51 lines
856 B
C
51 lines
856 B
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <errno.h>
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int main(int argc, char **argv) {
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char n_flag = 0;
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int opt;
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while ((opt = getopt(argc, argv, "n")) != -1) {
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switch (opt) {
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case 'n':
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n_flag = 1;
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break;
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default:
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puts("readlink [n] [file1 file2...]\n\t-n Don't add newline");
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return 0;
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}
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}
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argv += optind;
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argc -= optind;
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for (int i = 0; i < argc; i++) {
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char path[PATH_MAX + 1];
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ssize_t r = readlink(argv[i], path, sizeof(path) - 1);
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if (r < 0) {
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fprintf(stderr, "readlink: %s: %s\n", argv[i], strerror(errno));
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return 1;
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}
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if (r > (ssize_t)sizeof(path)) {
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fprintf(stderr, "readlink: %s: path too long\n", argv[i]);
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return 1;
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}
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path[r] = '\0';
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if (n_flag)
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fputs(path, stdout);
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else
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puts(path);
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}
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return 0;
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}
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